[U-Boot] [PATCH 2/9] Tegra: T30: Add AVP (arm720t) files

Tom Warren
2012-09-12T22:10:48Z

Signed-off-by: Tom Warren <twarren@nvidia.com>
---
arch/arm/cpu/arm720t/tegra30/Makefile | 48 +++
arch/arm/cpu/arm720t/tegra30/board.h | 25 ++
arch/arm/cpu/arm720t/tegra30/config.mk | 26 ++
arch/arm/cpu/arm720t/tegra30/cpu.c | 570 ++++++++++++++++++++++++++++++++
arch/arm/cpu/arm720t/tegra30/cpu.h | 65 ++++
arch/arm/cpu/arm720t/tegra30/spl.c | 132 ++++++++
6 files changed, 866 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/cpu/arm720t/tegra30/Makefile
create mode 100644 arch/arm/cpu/arm720t/tegra30/board.h
create mode 100644 arch/arm/cpu/arm720t/tegra30/config.mk
create mode 100644 arch/arm/cpu/arm720t/tegra30/cpu.c
create mode 100644 arch/arm/cpu/arm720t/tegra30/cpu.h
create mode 100644 arch/arm/cpu/arm720t/tegra30/spl.c

diff --git a/arch/arm/cpu/arm720t/tegra30/Makefile b/arch/arm/cpu/arm720t/tegra30/Makefile
new file mode 100644
index 0000000..96e722c
--- /dev/null
+++ b/arch/arm/cpu/arm720t/tegra30/Makefile
@@ -0,0 +1,48 @@
+#
+# (C) Copyright 2010-2012 Nvidia Corporation.
+#
+# (C) Copyright 2000-2008
+# Wolfgang Denk, DENX Software Engineering, wd at denx.de.
+#
+# See file CREDITS for list of people who contributed to this
+# project.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 2 of
+# the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+# MA 02111-1307 USA
+#
+
+include $(TOPDIR)/config.mk
+
+LIB = $(obj)lib$(SOC).o
+
+COBJS-y += cpu.o
+COBJS-$(CONFIG_SPL_BUILD) += spl.o
+
+SRCS := $(COBJS-y:.o=.c)
+OBJS := $(addprefix $(obj),$(COBJS-y))
+
+all: $(obj).depend $(LIB)
+
+$(LIB): $(OBJS)
+ $(call cmd_link_o_target, $(OBJS))
+
+#########################################################################
+
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
+
+sinclude $(obj).depend
+
+#########################################################################
diff --git a/arch/arm/cpu/arm720t/tegra30/board.h b/arch/arm/cpu/arm720t/tegra30/board.h
new file mode 100644
index 0000000..fc11a7b
--- /dev/null
+++ b/arch/arm/cpu/arm720t/tegra30/board.h
@@ -0,0 +1,25 @@
+/*
+ * (C) Copyright 2010-2012
+ * NVIDIA Corporation <www.nvidia.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+void board_init_uart_f(void);
+void gpio_config_uart(void);
diff --git a/arch/arm/cpu/arm720t/tegra30/config.mk b/arch/arm/cpu/arm720t/tegra30/config.mk
new file mode 100644
index 0000000..ca9c6ea
--- /dev/null
+++ b/arch/arm/cpu/arm720t/tegra30/config.mk
@@ -0,0 +1,26 @@
+#
+# (C) Copyright 2010-2012
+# NVIDIA Corporation <www.nvidia.com>
+#
+# (C) Copyright 2002
+# Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
+#
+# See file CREDITS for list of people who contributed to this
+# project.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 2 of
+# the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+# MA 02111-1307 USA
+#
+USE_PRIVATE_LIBGCC = yes
diff --git a/arch/arm/cpu/arm720t/tegra30/cpu.c b/arch/arm/cpu/arm720t/tegra30/cpu.c
new file mode 100644
index 0000000..f7d9b87
--- /dev/null
+++ b/arch/arm/cpu/arm720t/tegra30/cpu.c
@@ -0,0 +1,570 @@
+/*
+ * (C) Copyright 2010-2012
+ * NVIDIA Corporation <www.nvidia.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/tegra30.h>
+#include <asm/arch/clk_rst.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/flow.h>
+#include <asm/arch/fuse.h>
+#include <asm/arch/tegra_i2c.h>
+#include <asm/arch/pinmux.h>
+#include <asm/arch/pmc.h>
+#include <asm/arch/scu.h>
+#include "cpu.h"
+
+struct clk_pll_table {
+ u16 n;
+ u16 m;
+ u8 p;
+ u8 cpcon;
+};
+
+/* ~0=uninitialized/unknown, 0=false, 1=true */
+uint32_t is_tegra_processor_reset = 0xffffffff;
+
+/*
+ * Timing tables for each SOC for all four oscillator options.
+ */
+static struct clk_pll_table tegra_pll_x_table[TEGRA_SOC_COUNT]
+ [CLOCK_OSC_FREQ_COUNT] = {
+ /* T20: 1 GHz */
+ {{ 1000, 13, 0, 12}, /* OSC 13M */
+ { 625, 12, 0, 8}, /* OSC 19.2M */
+ { 1000, 12, 0, 12}, /* OSC 12M */
+ { 1000, 26, 0, 12}, /* OSC 26M */
+ },
+
+ /* T25: 1.2 GHz */
+ {{ 923, 10, 0, 12},
+ { 750, 12, 0, 8},
+ { 600, 6, 0, 12},
+ { 600, 13, 0, 12},
+ },
+
+ /* T30(slow): 1.0 GHz */
+ {{ 1000, 13, 0, 8},
+ { 625, 12, 0, 4},
+ { 1000, 12, 0, 8},
+ { 1000, 26, 0, 8},
+ },
+
+ /* T30(high): 1.4 GHz */
+ {{ 862, 8, 0, 8},
+ { 583, 8, 0, 4},
+ { 700, 6, 0, 8},
+ { 700, 13, 0, 8},
+ },
+
+ /* TEGRA_SOC2_SLOW: 312 MHz */
+ {{ 312, 13, 0, 12}, /* OSC 13M */
+ { 260, 16, 0, 8}, /* OSC 19.2M */
+ { 312, 12, 0, 12}, /* OSC 12M */
+ { 312, 26, 0, 12}, /* OSC 26M */
+ },
+};
+
+enum tegra_family_t {
+ TEGRA_FAMILY_T2x,
+ TEGRA_FAMILY_T3x,
+};
+
+int tegra_get_chip_type(void)
+{
+ struct fuse_regs *fuse = (struct fuse_regs *)NV_PA_FUSE_BASE;
+ uint tegra_sku_id;
+
+ debug("tegra_get_chip_type entry\n");
+ tegra_sku_id = readl(&fuse->sku_info) & 0xff;
+ debug(" tegra_get_chip_type: sku_id = %d\n", tegra_sku_id);
+
+ switch (tegra_sku_id) {
+ case SKU_ID_T20:
+ return TEGRA_SOC_T20;
+ case SKU_ID_T25SE:
+ case SKU_ID_AP25:
+ case SKU_ID_T25:
+ case SKU_ID_AP25E:
+ case SKU_ID_T25E:
+ return TEGRA_SOC_T25;
+ case SKU_ID_T30:
+ /*
+ * T30 has two options. We will return TEGRA_SOC_T30 until
+ * we have the fdt set up when it may change to
+ * TEGRA_SOC_T30_408MHZ depending on what we set PLLP to.
+ */
+ if (clock_get_rate(CLOCK_ID_PERIPH) == 408000000)
+ return TEGRA_SOC_T30_408MHZ;
+ else
+ return TEGRA_SOC_T30;
+
+ default:
+ /* unknown sku id */
+ return TEGRA_SOC_UNKNOWN;
+ }
+}
+
+static enum tegra_family_t get_family(void)
+{
+ u32 reg, chip_id;
+
+ debug("tegra_get_family entry\n");
+ reg = readl(NV_PA_APB_MISC_BASE + GP_HIDREV);
+
+ chip_id = reg >> 8;
+ chip_id &= 0xff;
+ debug(" tegra_get_family: chip_id = %x\n", chip_id);
+ if (chip_id == 0x30)
+ return TEGRA_FAMILY_T3x;
+ else
+ return TEGRA_FAMILY_T2x;
+}
+
+int get_num_cpus(void)
+{
+ return get_family() == TEGRA_FAMILY_T3x ? 4 : 2;
+}
+
+/* Returns 1 if the current CPU executing is a Cortex-A9, else 0 */
+int cpu_is_cortexa9(void)
+{
+ u32 id = readb(NV_PA_PG_UP_BASE + PG_UP_TAG_0);
+ return id == (PG_UP_TAG_0_PID_CPU & 0xff);
+}
+
+static void adjust_pllp_out_freqs(void)
+{
+ struct clk_rst_ctlr *clkrst = (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
+ struct clk_pll *pll = &clkrst->crc_pll[CLOCK_ID_PERIPH];
+ u32 reg;
+
+ /* Set T30 PLLP_OUT1, 2, 3 & 4 freqs to 9.6, 48, 102 & 204MHz */
+ reg = readl(&pll->pll_out); /* OUTA, contains OUT2 / OUT1 */
+ reg |= (IN_408_OUT_48_DIVISOR << PLLP_OUT2_RATIO) | PLLP_OUT2_OVR
+ | (IN_408_OUT_9_6_DIVISOR << PLLP_OUT1_RATIO) | PLLP_OUT1_OVR;
+ writel(reg, &pll->pll_out);
+
+ reg = readl(&pll->pll_out_b); /* OUTB, contains OUT4 / OUT3 */
+ reg |= (IN_408_OUT_204_DIVISOR << PLLP_OUT4_RATIO) | PLLP_OUT4_OVR
+ | (IN_408_OUT_102_DIVISOR << PLLP_OUT3_RATIO) | PLLP_OUT3_OVR;
+ writel(reg, &pll->pll_out_b);
+}
+
+static int pllx_set_rate(struct clk_pll_simple *pll , u32 divn, u32 divm,
+ u32 divp, u32 cpcon)
+{
+ u32 reg;
+
+ /* If PLLX is already enabled, just return */
+ if (readl(&pll->pll_base) & PLL_ENABLE_MASK) {
+ debug("pllx_set_rate: PLLX already enabled, returning\n");
+ return 0;
+ }
+
+ debug(" pllx_set_rate entry\n");
+
+ /* Set BYPASS, m, n and p to PLLX_BASE */
+ reg = PLL_BYPASS_MASK | (divm << PLL_DIVM_SHIFT);
+ reg |= ((divn << PLL_DIVN_SHIFT) | (divp << PLL_DIVP_SHIFT));
+ writel(reg, &pll->pll_base);
+
+ /* Set cpcon to PLLX_MISC */
+ reg = (cpcon << PLL_CPCON_SHIFT);
+
+ /* Set dccon to PLLX_MISC if freq > 600MHz */
+ if (divn > 600)
+ reg |= (1 << PLL_DCCON_SHIFT);
+ writel(reg, &pll->pll_misc);
+
+ /* Enable PLLX */
+ reg = readl(&pll->pll_base);
+ reg |= PLL_ENABLE_MASK;
+
+ /* Disable BYPASS */
+ reg &= ~PLL_BYPASS_MASK;
+ writel(reg, &pll->pll_base);
+
+ /* Set lock_enable to PLLX_MISC */
+ reg = readl(&pll->pll_misc);
+ reg |= PLL_LOCK_ENABLE_MASK;
+ writel(reg, &pll->pll_misc);
+
+ return 0;
+}
+
+void init_pllx(int slow)
+{
+ struct clk_rst_ctlr *clkrst = (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
+ struct clk_pll_simple *pll = &clkrst->crc_pll_simple[SIMPLE_PLLX];
+ int chip_type;
+ enum clock_osc_freq osc;
+ struct clk_pll_table *sel;
+
+ debug("init_pllx entry\n");
+
+ /* get chip type. If unknown, assign to T30 */
+ chip_type = tegra_get_chip_type();
+ if (chip_type == TEGRA_SOC_UNKNOWN)
+ chip_type = TEGRA_SOC_T30;
+ debug(" init_pllx: chip_type = %d\n", chip_type);
+
+ /* get osc freq */
+ osc = clock_get_osc_freq();
+ debug(" init_pllx: osc = %d\n", osc);
+
+ /* set pllx */
+ sel = &tegra_pll_x_table[chip_type][osc];
+ pllx_set_rate(pll, sel->n, sel->m, sel->p, sel->cpcon);
+
+ /* once we are out of slow mode, set up the T30 PLLs also */
+ if (!slow && chip_type == TEGRA_SOC_T30_408MHZ) {
+ debug(" init_pllx: adjusting PLLP out freqs\n");
+ adjust_pllp_out_freqs();
+ }
+}
+
+static void enable_cpu_clock(int enable)
+{
+ struct clk_rst_ctlr *clkrst = (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
+ u32 clk;
+
+ debug("enable_cpu_clock entry, enable = %d\n", enable);
+ /*
+ * NOTE:
+ * Regardless of whether the request is to enable or disable the CPU
+ * clock, every processor in the CPU complex except the master (CPU 0)
+ * will have it's clock stopped because the AVP only talks to the
+ * master. The AVP does not know (nor does it need to know) that there
+ * are multiple processors in the CPU complex.
+ */
+
+ if (enable) {
+ /* Initialize PLLX in 'slow' mode */
+ init_pllx(1);
+
+ /* Wait until all clocks are stable */
+ udelay(PLL_STABILIZATION_DELAY);
+
+ writel(CCLK_BURST_POLICY, &clkrst->crc_cclk_brst_pol);
+ writel(SUPER_CCLK_DIVIDER, &clkrst->crc_super_cclk_div);
+ }
+
+ /*
+ * Read the register containing the individual CPU clock enables and
+ * always stop the clock to CPUs 1, 2 & 3.
+ */
+ clk = readl(&clkrst->crc_clk_cpu_cmplx);
+ clk |= 1 << CPU1_CLK_STP_SHIFT;
+ clk |= 1 << CPU2_CLK_STP_SHIFT;
+ clk |= 1 << CPU3_CLK_STP_SHIFT;
+
+ /* Stop/Unstop the CPU clock */
+ clk &= ~CPU0_CLK_STP_MASK;
+ clk |= !enable << CPU0_CLK_STP_SHIFT;
+ writel(clk, &clkrst->crc_clk_cpu_cmplx);
+
+ clock_enable(PERIPH_ID_CPU);
+ debug("enable_cpu_clock entry, enabled CPU clock\n");
+}
+
+static int is_cpu_powered(void)
+{
+ struct pmc_ctlr *pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE;
+
+ debug("is_cpu_powered entry\n");
+ return (readl(&pmc->pmc_pwrgate_status) & CPU_PWRED) ? 1 : 0;
+}
+
+static void remove_cpu_io_clamps(void)
+{
+ struct pmc_ctlr *pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE;
+ u32 reg;
+
+ debug("remove_cpu_io_clamps entry\n");
+ /* Remove the clamps on the CPU I/O signals */
+ reg = readl(&pmc->pmc_remove_clamping);
+ reg |= CPU_CLMP;
+ writel(reg, &pmc->pmc_remove_clamping);
+
+ /* Give I/O signals time to stabilize */
+ udelay(IO_STABILIZATION_DELAY);
+}
+
+static void powerup_cpu(void)
+{
+ struct pmc_ctlr *pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE;
+ u32 reg;
+ int timeout = IO_STABILIZATION_DELAY;
+
+ debug("powerup_cpu entry\n");
+ if (!is_cpu_powered()) {
+ /* Toggle the CPU power state (OFF -> ON) */
+ reg = readl(&pmc->pmc_pwrgate_toggle);
+ reg &= PARTID_CP;
+ reg |= START_CP;
+ writel(reg, &pmc->pmc_pwrgate_toggle);
+
+ /* Wait for the power to come up */
+ while (!is_cpu_powered()) {
+ if (timeout-- == 0)
+ printf("CPU failed to power up!\n");
+ else
+ udelay(10);
+ }
+
+ /*
+ * Remove the I/O clamps from CPU power partition.
+ * Recommended only on a Warm boot, if the CPU partition gets
+ * power gated. Shouldn't cause any harm when called after a
+ * cold boot according to HW, probably just redundant.
+ */
+ remove_cpu_io_clamps();
+ }
+}
+
+void tegra_i2c_ll_write_addr(uint addr, uint config)
+{
+ struct i2c_ctlr *reg = (struct i2c_ctlr *)TEGRA_DVC_BASE;
+
+ writel(addr, &reg->cmd_addr0);
+ writel(config, &reg->cnfg);
+}
+
+void tegra_i2c_ll_write_data(uint data, uint config)
+{
+ struct i2c_ctlr *reg = (struct i2c_ctlr *)TEGRA_DVC_BASE;
+
+ writel(data, &reg->cmd_data1);
+ writel(config, &reg->cnfg);
+}
+
+static void enable_cpu_power_rail(void)
+{
+ struct pmc_ctlr *pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE;
+ u32 reg;
+
+ debug("enable_cpu_power_rail entry\n");
+ reg = readl(&pmc->pmc_cntrl);
+ reg |= CPUPWRREQ_OE;
+ writel(reg, &pmc->pmc_cntrl);
+
+ /*
+ * Pulse PWRREQ via I2C. We need to find out what this is
+ * doing, tidy up the code and maybe find a better place for it.
+ */
+ tegra_i2c_ll_write_addr(0x005a, 0x0002);
+ tegra_i2c_ll_write_data(0x2328, 0x0a02);
+ udelay(1000);
+ tegra_i2c_ll_write_data(0x0127, 0x0a02);
+ udelay(10 * 1000);
+
+ /*
+ * The TI PMU65861C needs a 3.75ms delay between enabling
+ * the power rail and enabling the CPU clock. This delay
+ * between SM1EN and SM1 is for switching time + the ramp
+ * up of the voltage to the CPU (VDD_CPU from PMU). We use 0xf00 as
+ * is is ARM-friendly (can fit in a single ARMv4T mov immmediate
+ * instruction).
+ */
+ udelay(3840);
+}
+
+static void reset_A9_cpu(int reset)
+{
+ /*
+ * NOTE: Regardless of whether the request is to hold the CPU in reset
+ * or take it out of reset, every processor in the CPU complex
+ * except the master (CPU 0) will be held in reset because the
+ * AVP only talks to the master. The AVP does not know that there
+ * are multiple processors in the CPU complex.
+ */
+ int mask = crc_rst_cpu | crc_rst_de | crc_rst_debug;
+ int num_cpus = get_num_cpus();
+ int cpu;
+
+ debug("reset_a9_cpu entry\n");
+ /* Hold CPUs 1 onwards in reset, and CPU 0 if asked */
+ for (cpu = 1; cpu < num_cpus; cpu++)
+ reset_cmplx_set_enable(cpu, mask, 1);
+ reset_cmplx_set_enable(0, mask, reset);
+
+ /* Enable/Disable master CPU reset */
+ reset_set_enable(PERIPH_ID_CPU, reset);
+}
+
+/**
+ * The T30 requires some special clock initialization, including setting up
+ * the dvc i2c, turning on mselect and selecting the G CPU cluster
+ */
+void t30_init_clocks(void)
+{
+ /*
+ * Sadly our clock functions don't support the V and W clocks of T30
+ * yet, as well as a few other functions, so use low-level register
+ * access for now. This eventual removal of low-level code from
+ * ap20.c is the same process we went through for T20.
+ */
+ struct clk_rst_ctlr *clkrst =
+ (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
+ struct flow_ctlr *flow = (struct flow_ctlr *)NV_PA_FLOW_BASE;
+ u32 val;
+
+ debug("t30_init_clocks entry\n");
+ /* Set active CPU cluster to G */
+ clrbits_le32(flow->cluster_control, 1 << 0);
+
+ /*
+ * Switch system clock to PLLP_OUT4 (108 MHz), AVP will now run
+ *@108 MHz. This is glitch free as only the source is changed, no
+ * special precaution needed.
+ */
+ val = (SCLK_SOURCE_PLLP_OUT4 << SCLK_SWAKEUP_FIQ_SOURCE_SHIFT) |
+ (SCLK_SOURCE_PLLP_OUT4 << SCLK_SWAKEUP_IRQ_SOURCE_SHIFT) |
+ (SCLK_SOURCE_PLLP_OUT4 << SCLK_SWAKEUP_RUN_SOURCE_SHIFT) |
+ (SCLK_SOURCE_PLLP_OUT4 << SCLK_SWAKEUP_IDLE_SOURCE_SHIFT) |
+ (SCLK_SYS_STATE_RUN << SCLK_SYS_STATE_SHIFT);
+ writel(val, &clkrst->crc_sclk_brst_pol);
+
+ writel(SUPER_SCLK_ENB_MASK, &clkrst->crc_super_sclk_div);
+
+ val = (0 << CLK_SYS_RATE_HCLK_DISABLE_SHIFT) |
+ (1 << CLK_SYS_RATE_AHB_RATE_SHIFT) |
+ (0 << CLK_SYS_RATE_PCLK_DISABLE_SHIFT) |
+ (0 << CLK_SYS_RATE_APB_RATE_SHIFT);
+ writel(val, &clkrst->crc_clk_sys_rate);
+
+ /* Put i2c, mselect in reset and enable clocks */
+ reset_set_enable(PERIPH_ID_DVC_I2C, 1);
+ clock_set_enable(PERIPH_ID_DVC_I2C, 1);
+ reset_set_enable(PERIPH_ID_MSELECT, 1);
+ clock_set_enable(PERIPH_ID_MSELECT, 1);
+
+ /* Switch MSELECT clock to PLLP (00) */
+ clock_ll_set_source(PERIPH_ID_MSELECT, 0);
+
+ /*
+ * Our high-level clock routines are not available prior to
+ * relocation. We use the low-level functions which require a
+ * hard-coded divisor. Use CLK_M with divide by (n + 1 = 17)
+ */
+ clock_ll_set_source_divisor(PERIPH_ID_DVC_I2C, 3, 16);
+
+ /*
+ * Give clocks time to stabilize, then take i2c and mselect out of
+ * reset
+ */
+ udelay(1000);
+ reset_set_enable(PERIPH_ID_DVC_I2C, 0);
+ reset_set_enable(PERIPH_ID_MSELECT, 0);
+}
+
+static void clock_enable_coresight(int enable)
+{
+ u32 rst, src;
+
+ debug("clock_enable_coresight entry\n");
+ clock_set_enable(PERIPH_ID_CORESIGHT, enable);
+ reset_set_enable(PERIPH_ID_CORESIGHT, !enable);
+
+ if (enable) {
+ /*
+ * Put CoreSight on PLLP_OUT0 (216 MHz) and divide it down by
+ * 1.5, giving an effective frequency of 144MHz.
+ * Set PLLP_OUT0 [bits31:30 = 00], and use a 7.1 divisor
+ * (bits 7:0), so 00000001b == 1.5 (n+1 + .5)
+ *
+ * Clock divider request for 204MHz would setup CSITE clock as
+ * 144MHz for PLLP base 216MHz and 204MHz for PLLP base 408MHz
+ */
+ if (tegra_get_chip_type() == TEGRA_SOC_T30_408MHZ)
+ src = CLK_DIVIDER(NVBL_PLLP_KHZ, 204000);
+ else
+ src = CLK_DIVIDER(NVBL_PLLP_KHZ, 144000);
+ clock_ll_set_source_divisor(PERIPH_ID_CSI, 0, src);
+
+ /* Unlock the CPU CoreSight interfaces */
+ rst = CORESIGHT_UNLOCK;
+ writel(rst, CSITE_CPU_DBG0_LAR);
+ writel(rst, CSITE_CPU_DBG1_LAR);
+ writel(rst, CSITE_CPU_DBG2_LAR);
+ writel(rst, CSITE_CPU_DBG3_LAR);
+ }
+}
+
+static void set_cpu_running(int run)
+{
+ struct flow_ctlr *flow = (struct flow_ctlr *)NV_PA_FLOW_BASE;
+
+ debug("set_cpu_running entry, run = %d\n", run);
+ writel(run ? FLOW_MODE_NONE : FLOW_MODE_STOP, &flow->halt_cpu_events);
+}
+
+void start_cpu(u32 reset_vector)
+{
+ debug("start_cpu entry, reset_vector = %x\n", reset_vector);
+ t30_init_clocks();
+
+ /* Enable VDD_CPU */
+ enable_cpu_power_rail();
+
+ set_cpu_running(0);
+
+ /* Hold the CPUs in reset */
+ reset_A9_cpu(1);
+
+ /* Disable the CPU clock */
+ enable_cpu_clock(0);
+
+ /* Enable CoreSight */
+ clock_enable_coresight(1);
+
+ /*
+ * Set the entry point for CPU execution from reset,
+ * if it's a non-zero value.
+ */
+ if (reset_vector)
+ writel(reset_vector, EXCEP_VECTOR_CPU_RESET_VECTOR);
+
+ /* Enable the CPU clock */
+ enable_cpu_clock(1);
+
+ /* If the CPU doesn't already have power, power it up */
+ powerup_cpu();
+
+ /* Take the CPU out of reset */
+ reset_A9_cpu(0);
+
+ set_cpu_running(1);
+}
+
+
+void halt_avp(void)
+{
+ debug("halt_avp entry\n");
+ for (;;) {
+ writel((HALT_COP_EVENT_JTAG | HALT_COP_EVENT_IRQ_1 \
+ | HALT_COP_EVENT_FIQ_1 | (FLOW_MODE_STOP<<29)),
+ FLOW_CTLR_HALT_COP_EVENTS);
+ }
+}
diff --git a/arch/arm/cpu/arm720t/tegra30/cpu.h b/arch/arm/cpu/arm720t/tegra30/cpu.h
new file mode 100644
index 0000000..a5c0474
--- /dev/null
+++ b/arch/arm/cpu/arm720t/tegra30/cpu.h
@@ -0,0 +1,65 @@
+/*
+ * (C) Copyright 2010-2012
+ * NVIDIA Corporation <www.nvidia.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+#include <asm/types.h>
+
+/* Stabilization delays, in usec */
+#define PLL_STABILIZATION_DELAY (300)
+#define IO_STABILIZATION_DELAY (1000)
+
+#define NVBL_PLLP_KHZ (216000)
+
+#define PLLX_ENABLED (1 << 30)
+#define CCLK_BURST_POLICY 0x20008888
+#define SUPER_CCLK_DIVIDER 0x80000000
+
+/* Calculate clock fractional divider value from ref and target frequencies */
+#define CLK_DIVIDER(REF, FREQ) ((((REF) * 2) / FREQ) - 2)
+
+/* Calculate clock frequency value from reference and clock divider value */
+#define CLK_FREQUENCY(REF, REG) (((REF) * 2) / (REG + 2))
+
+/* AVP/CPU ID */
+#define PG_UP_TAG_0_PID_CPU 0x55555555 /* CPU aka "a9" aka "mpcore" */
+#define PG_UP_TAG_0 0x0
+
+#define CORESIGHT_UNLOCK 0xC5ACCE55;
+
+#define EXCEP_VECTOR_CPU_RESET_VECTOR (NV_PA_EVP_BASE + 0x100)
+#define CSITE_CPU_DBG0_LAR (NV_PA_CSITE_BASE + 0x10FB0)
+#define CSITE_CPU_DBG1_LAR (NV_PA_CSITE_BASE + 0x12FB0)
+#define CSITE_CPU_DBG2_LAR (NV_PA_CSITE_BASE + 0x14FB0)
+#define CSITE_CPU_DBG3_LAR (NV_PA_CSITE_BASE + 0x16FB0)
+
+#define FLOW_CTLR_HALT_COP_EVENTS (NV_PA_FLOW_BASE + 4)
+#define FLOW_MODE_STOP 2
+#define HALT_COP_EVENT_JTAG (1 << 28)
+#define HALT_COP_EVENT_IRQ_1 (1 << 11)
+#define HALT_COP_EVENT_FIQ_1 (1 << 9)
+
+#define GP_HIDREV 0x804
+#define FLOW_MODE_NONE 0
+
+#define SIMPLE_PLLX (CLOCK_ID_XCPU - CLOCK_ID_FIRST_SIMPLE)
+
+void start_cpu(u32 reset_vector);
+void halt_avp(void) __attribute__ ((noreturn));
diff --git a/arch/arm/cpu/arm720t/tegra30/spl.c b/arch/arm/cpu/arm720t/tegra30/spl.c
new file mode 100644
index 0000000..c391746
--- /dev/null
+++ b/arch/arm/cpu/arm720t/tegra30/spl.c
@@ -0,0 +1,132 @@
+/*
+ * (C) Copyright 2012
+ * NVIDIA Inc, <www.nvidia.com>
+ *
+ * Allen Martin <amartin@nvidia.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+#include <common.h>
+#include <asm/u-boot.h>
+#include <asm/utils.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/arch/clock.h>
+#include <nand.h>
+#include <mmc.h>
+#include <fat.h>
+#include <version.h>
+#include <i2c.h>
+#include <image.h>
+#include <malloc.h>
+#include <linux/compiler.h>
+#include "board.h"
+#include "cpu.h"
+
+#include <asm/io.h>
+#include <asm/arch/tegra30.h>
+#include <asm/arch/clk_rst.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/pmc.h>
+#include <asm/arch/pinmux.h>
+#include <asm/arch/scu.h>
+#include <common.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/* Define global data structure pointer to it*/
+static gd_t gdata __attribute__ ((section(".data")));
+static bd_t bdata __attribute__ ((section(".data")));
+
+inline void hang(void)
+{
+ puts("### ERROR ### Please RESET the board ###\n");
+ for (;;)
+ ;
+}
+
+void board_init_f(ulong dummy)
+{
+ board_init_uart_f();
+
+ /* Initialize periph GPIOs */
+#ifdef CONFIG_SPI_UART_SWITCH
+ gpio_early_init_uart();
+#else
+ gpio_config_uart();
+#endif
+
+ /*
+ * We call relocate_code() with relocation target same as the
+ * CONFIG_SYS_SPL_TEXT_BASE. This will result in relocation getting
+ * skipped. Instead, only .bss initialization will happen. That's
+ * all we need
+ */
+ debug(">>board_init_f()\n");
+ relocate_code(CONFIG_SPL_STACK, &gdata, CONFIG_SPL_TEXT_BASE);
+}
+
+/* This requires UART clocks to be enabled */
+static void preloader_console_init(void)
+{
+ const char *u_boot_rev = U_BOOT_VERSION;
+
+ gd = &gdata;
+ gd->bd = &bdata;
+ gd->flags |= GD_FLG_RELOC;
+ gd->baudrate = CONFIG_BAUDRATE;
+
+ serial_init(); /* serial communications setup */
+
+ gd->have_console = 1;
+
+ /* Avoid a second "U-Boot" coming from this string */
+ u_boot_rev = &u_boot_rev[7];
+
+ printf("\nU-Boot SPL %s (%s - %s)\n", u_boot_rev, U_BOOT_DATE,
+ U_BOOT_TIME);
+}
+
+void board_init_r(gd_t *id, ulong dummy)
+{
+ struct pmux_tri_ctlr *pmt = (struct pmux_tri_ctlr *)NV_PA_APB_MISC_BASE;
+
+ /* enable JTAG */
+ writel(0xC0, &pmt->pmt_cfg_ctl);
+
+ debug(">>spl:board_init_r()\n");
+
+ mem_malloc_init(CONFIG_SYS_SPL_MALLOC_START,
+ CONFIG_SYS_SPL_MALLOC_SIZE);
+
+#ifdef CONFIG_SPL_BOARD_INIT
+ spl_board_init();
+#endif
+
+ clock_early_init();
+ preloader_console_init();
+
+ start_cpu((u32)CONFIG_SYS_TEXT_BASE);
+ halt_avp();
+ /* not reached */
+}
+
+int board_usb_init(const void *blob)
+{
+ return 0;
+}
--
1.7.0.4